The purposes of this research were: 1) to develop a questionnaire of 7 dimensions of wellnessfor students. The procedure of the questionnaire development as follows; the first 150 items, 15 itemsfor each dimension were created as a drafted wellness questionnaire according to the definition ofeach dimension. The content and construct validity of the questionnaire and the items were tested by5 experts (Delphi techniques) with 05-1.00 of IOC (Index of item–objective congruence) score ofagreement. As a result, 87 items of 7 dimensions of wellness questionnaire, with 5 rating scales. Thenthe reliability of questions interpretation testing by 31 students. It was found that, the overall was 0.96,dimension 1–7 were 0.66, 0.84, 0.80, 0.88, 0.52, 0.82 and 0.91 respectively. Dimension 1 (Physical)and 5 (Occupation) reliability were lower than 0.07. Some questions were revised due to the wordingcaused misinterpreting. And one question was deleted. The revised dimensions were re tested with thesame samples. The reliability testing by Cronbach internal consistency shown overall and eachdimension above 0.07. A pilot project was managed for reliability testing, with 100 students fromdifferent groups of last samples. The results showed that, overall was 0.95 and 0.77 on physical 0.84on emotional .0.80 on intellectual 0.88 on social 0.83 on environment, 0.82 on study/or occupationand 0.91 on spiritual dimensions. The wellness questionnaire for students was good on validity andreliability, and could be used for these purposes. The questionnaire were use to test with 600 BUUstudents. The results of internal consistency showed that, overall was 0.96 and 0.74 on physical,0.84 on emotional .0.85 on intellectual 0.85 on social 0.87 on environment, 0.84 on study/or occupationand 0.88 on spiritual dimensions. The wellness questionnaire for students was good on validity andreliability, and could be used for these purposes
